- AT&T Intellectual Property, LLC
- Dolby Laboratories, Inc.
- Electronics and Telecommunications Research Institute (ETRI)
- Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung, e.V.
- Google LLC
- Koninklijke Philips N.V.
- Microsoft Corporation
- Navigate LLC
- NEC Corporation
- Nippon Telegraph and Telephone Corporation
- NTT DOCOMO, INC.
- Orange SA
- Panasonic Holdings Corporation
- Samsung Electronics Co., Ltd.
- Sony Group Corporation
- VoiceAge Corporation
